APA (7th ed.) Citation

Appleton, V. (1997). Tom Swift and His Big Tunnel; Or, The Hidden City of the Andes. Project Gutenberg.

Chicago Style (17th ed.) Citation

Appleton, Victor. Tom Swift and His Big Tunnel; Or, The Hidden City of the Andes. Project Gutenberg, 1997.

MLA (9th ed.) Citation

Appleton, Victor. Tom Swift and His Big Tunnel; Or, The Hidden City of the Andes. Project Gutenberg, 1997.

Warning: These citations may not always be 100% accurate.